[email protected] (Dana Mitchell) writes: > Current (for us 2.1) z/OS HCD still shows 3375 as a valid DASD device > type. IIRC 3375 was emulated CKD on FBA 3370 HDA's. I also think > 3375s were used as the storage for the embedded 43X1's used as > processor controllers on 3090s.
re: http://www.garlic.com/~lynn/2018.html#41 VSAM usage for ancient disk models FEs had bootstrap service process ... starting with incrementally scoping for dignoses for failed component. 3081 had circuits enclosed in TCMs ... no longer capable of scoping. Went to "service processor" (with 3310 FBA disk) that could be scoped/diagnosed and then used to analyze large number of probes embedded in TCMs. Original move to 3090 was going to be 4331 running customized version of VM370 Release 6 for service processor (with 3370 disk, instead of RYO primitive customized operating system done from scratch) and all service screens done in CMS IOS3270 ... this was upgraded to pair of (redundant) 4361s for "3092" https://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP3090.html In addition, the 3092 processor controller requires two IBM 3370 model A2 direct access storage devices with string switches or equivalent. The 3092 requires access to a customer-supplied 3420 model 4, 6 or 8 tape drive or equivalent. ... snip ... trivia: I had wanted to show that REXX (before customer release, originally just REX) wasn't just another pretty scripting language ... I decided on demo'ing that I could redo IPCS (very large assembler application) in less than 3months elapsed time working half time with ten times the function and running ten times faster (some slight of hand for REXX to run faster than assembler). I finished early so started doing library of automated scripts that searched/analyzed for lots of different kind of failure signatures. I had expected that it would be released to customers ... but for some reason it wasn't, even tho it became standard for internal datacenters and customer support PSRs. Some old email from the 3092 group wanting to include it http://www.garlic.com/~lynn/2010e.html#email861031 http://www.garlic.com/~lynn/2010e.html#email861223 Eventually I got approval for making presentations at SHARE and other customer user group meetings on how I implemented it .. and within a few months similar implementations started to appear. As an aside the implementation included functions like formating storage segments using maclib DSECTs and decompiling instruction sequences ... and this was in the "OCO-wars" (object code only) ... transition to no longer shipping source code. past posts http://www.garlic.com/~lynn/submain.html#dumprx other trivia: this is old "greencard" done in IOS3270 with q&d conversion to html: http://www.garlic.com/~lynn/gcard.html -- virtualization experience starting Jan1968, online at home since Mar1970 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
